Proposed Routing for IEEE 802.11S WMN

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Proposed Routing for IEEE 802.11S WMN

• Michael Bahr, Siemens Corporate Technology
• Presented By Alireza Moghaddam

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Overview

• History
• Routing in 802.11s
• HWMP
• Reactive/Proactive Routing
• Hybrid Routing
• RA-OLSR
• Summery

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History

• Drafts
• Draft D0.01 March, 2006 (First Draft)
• Draft D1.0 Dec, 2006
• Draft D1.06 July, 2007

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Example of IEEE 802.11s
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Routing

• Necessary HWMP routing
• Reactive Routing
• Proactive Routing
• Optional RA-OLSR

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Routing

• Based on MAC address.
• Uses radio-aware routing metric.
• Unicast, Multicast and Boradcast.
• Path Selection vs. routing.
• Single/Multiple radio devices.

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Frame Extension

• Extension of 4-address frame.
• MAC layer is amended.
• Physical Layer stays intact.
• Compatible with other layers.
• Mesh security is based on 802.11i.

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Routing
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HWMP

• Foundation Adaptation of RM-AODV
• Default routing protocol for IEEE 802.11s
• Reactive/proactive routing components.
• Used in IEEE 802.11s because
• Mobile Nodes
• Static Nodes

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Reactive routing

• Definition
• Based on AODV and DSR
• MAC-LAYER and RA-Metric
• RREQ, RREP, RERR messages.

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Proactive Routing

• Def Maintain routes to all destinations
• Why Proactive routing?
• Registration/Non-registration Modes

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Non-Registration Mode

• RANN messages
• Nodes have path to root
• Root has no information about children

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Registration Mode

• Each node has registers itself to the root.
• Nodes have Path to the root
• Root has list of all nodes inside network.

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Hybrid Routing

• Precondition for Hybrid Routing
• How does it work?

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Hybrid Routing
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Hybrid Routing
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Hybrid Routing
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HWMP
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RA-OLSR

• Optional proactive routing protocol of the
  emerging IEEE 802.11s framework.
• Adaptation of OLSR
• Routing Metric Radio-Aware
• Use of Mac instead of IP
• Why RA-OLSR?

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RA-OLSR
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RA-OLSR

• Multi-Point Relays Selection Criteria
• Hello Messages
• Advantages
• Disadvantages

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Summery

• 802.11s is a standard for WMN
• Uses a Hybrid Routing
• Reactive/Proactive/RA-OLSR
• Its NOT complete yet.

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• Questions